All-time boxing great Roy Jones Jr stands on the brink of retirement after a crushing loss to IBF light heavyweight champion Glencoffe Johnson.

The former champion at four weights was left sprawled on the floor, suffered concussion and could not leave the ring for a full 15 minutes.

Is now the time for the 35-year-old to bow out of boxing?

THE CASE FOR RETIREMENT

History tells us that boxers rarely get back to their best after taking severe punishment late in their careers.

Many toil on, but icons like Muhammad Ali and Joe Louis did themselves few favours by fighting on too long.

Jones may believe he has a few more good years in him and will certainly be tempted to try to avenge his loss.

But his two previous fights (a win and a loss) against Antonio Tarver proved his lightning-quick reflexes have dulled, prompting trainer Alton Merkerson to admit he is "getting hit more than he used to".